Effect of Knudsen Layer on the heat transfer in hypersonic rarefied gas flows

2019 ◽  
Vol 142 ◽  
pp. 134-141 ◽  
Author(s):  
Harshal Gijare ◽  
Apurva Bhagat ◽  
Nishanth Dongari
Keyword(s):  
Heat Transfer ◽  
Rarefied Gas ◽  
Knudsen Layer ◽  
Gas Flows ◽  
Rarefied Gas Flows

scholarly journals Generalized description of the Knudsen layer thickness in rarefied gas flows

2021 ◽  
Vol 33 (6) ◽  
pp. 061701
Author(s):  
Hassan Akhlaghi ◽  
Ehsan Roohi
Keyword(s):  
Layer Thickness ◽  
Rarefied Gas ◽  
Knudsen Layer ◽  
Gas Flows ◽  
Rarefied Gas Flows

Shock polar investigation in supersonic rarefied gas flows over a circular cylinder

2021 ◽  
Vol 33 (5) ◽  
pp. 052006
Author(s):  
Hassan Akhlaghi ◽  
Ehsan Roohi ◽  
Abbas Daliri ◽  
Mohammad-Reza Soltani
Keyword(s):  
Circular Cylinder ◽  
Rarefied Gas ◽  
Gas Flows ◽  
Rarefied Gas Flows

scholarly journals Rarefied gas flows through meshes and implications for atmospheric measurements

2001 ◽  
Vol 19 (5) ◽  
pp. 563-569 ◽  
Author(s):  
J. Gumbel
Keyword(s):  
Middle Atmosphere ◽  
Rarefied Gas ◽  
Direct Simulation Monte Carlo ◽  
Atmospheric Composition ◽  
Gas Flows ◽  
Atmospheric Measurements ◽  
Rarefied Gas Flows ◽  
Flow Disturbances ◽  
Composition And Structure ◽  
Compression Effects

Abstract. Meshes are commonly used as part of instruments for in situ atmospheric measurements. This study analyses the aerodynamic effect of meshes by means of wind tunnel experiments and numerical simulations. Based on the Direct Simulation Monte Carlo method, a simple mesh parameterisation is described and applied to a number of representative flow conditions. For open meshes freely exposed to the flow, substantial compression effects are found both upstream and downstream of the mesh. Meshes attached to close instrument structures, on the other hand, cause only minor flow disturbances. In an accompanying paper, the approach developed here is applied to the quantitative analysis of rocket-borne density measurements in the middle atmosphere.Key words. Atmospheric composition and structure (instruments and techniques; middle atmosphere – composition and chemistry)

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